When isolation valves are installed on the inlet and outlet pipes of the safety valve, if those isolation valves are gate valves, the valve stem should be installed horizontally
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In SH3012--2011, 10.2.10 states that when cut-off valves are installed on the inlet and outlet pipes of the safety valve, they should be sealed with lead or locked open； When the shut-off valve is a gate valve, the valve stem should be installed horizontally. Why \"when the shut-off valve is a gate valve, the valve stem should be installed horizontally\"? ? ? I hope fellow sailors can offer their help. Thank you!
This post was last edited by xlxuiin on 2016-11-28 23:04. Safety valves are all installed vertically, so the inlet valves have their valve stems installed horizontally. Primarily, for outlet valves and cross-line valves, the valve stems must be installed horizontally: this prevents the valves from falling and blocking the pipes, thereby avoiding issues with discharge.
It is to prevent the valve core from falling off and blocking the pipeline, as that could pose a risk. In our design, valves with a diameter of DN300 or larger have their valve stems installed horizontally!
To prevent the valve core from falling off and causing pipeline disconnection and accidents.
I have a question: in a row of pipes, for example those in the boundary zone, it’s not possible to install the shut-off valves all with their valve stems horizontal, right?
There is a fear that the gate plate may fall off, causing the safety valve to lose its function of protecting the equipment.
Thank you! Learn together*, improve together!